linux-kernel - Re: [RFC] [Patch] calgary iommu: Use the first kernel's tce tables in kdump

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Message-Id: <20080310090912.b9f34d27.akpm@linux-foundation.org>
Date:	Mon, 10 Mar 2008 09:09:12 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Chandru <chandru@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, jdmason@...zu.us,
	Muli Ben-Yehuda <muli@...ibm.com>
Subject: Re: [RFC] [Patch] calgary iommu: Use the first kernel's tce tables
 in kdump

On Mon, 10 Mar 2008 18:50:29 +0530 Chandru <chandru@...ibm.com> wrote:

> Chandru wrote:
> > Hi Muli,
> >
> > I have tried to work with CCR ,CSR, CSMR, CSAR, CFGRW, GBRERRM  
> > registers but have been unable to make calgary generate an exception 
> > upon error condition.  In alloc_tce_table() , I am setting WRITE_ONLY 
> > access permission bit to tce entries but it isn't helping.  Would you 
> > kindly let me know how we can make calgary to generate an exception in 
> > error conditions ?.
> >
> > Thanks,
> > Chandru
> >
> >
> Hello Andrew,
> 
> Could you pls consider the attached patch for inclusion in mainline.
> 

I can sort-of work out what the patch does from the above quote, but it
would be nice to have a proper changelog description from yourself rather
than having me try to write it, please.

> 
> Signed-off-by: Chandru S <chandru@...ibm.com>
> ---
> 
> --- arch/x86/kernel/pci-calgary_64.c.orig       2008-03-10 
> 15:54:08.000000000 +0530

The patch was badly wordwrapped.  Please fix your email client for the next
version.

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